JP4380269B2 - Non-contact type IC card reader - Google Patents

Description

  The present invention relates to an improvement in a non-contact type IC card reader that communicates with an IC card by radio waves by electromagnetic induction.

  In recent years, non-contact type IC cards that are difficult to counterfeit and change and have high safety are becoming popular.

  This non-contact type IC card does not have a power source for operating the IC inside, and when the IC card is held over the IC card reader, it receives a weak radio wave from the antenna of the card reader, Will occur. The IC card activated by this power and the card reader communicate with each other, and data in the IC card can be read and written.

  There are two types of communication methods between the non-contact IC card and the IC card reader: a synchronous type and an asynchronous type, and the IC card reader has a signal circuit and an antenna corresponding to one of the methods depending on each type. It includes a module.

The following Patent Document 1 describes an asynchronous IC card reader / writer.
Japanese Patent Laid-Open No. 1-150992

  Since each IC card reader corresponding to each communication method corresponds to one method, after the construction work such as embedding the card reader in a wall or the like, it is changed to another card type with a different communication method. When changing, the card reader itself had to be replaced, requiring re-construction.

  As a method for solving this problem, there is a method in which a circuit board provided with a plurality of communication circuits corresponding to a plurality of communication systems and respective connectors for connecting to a plurality of antenna modules is built in a card reader.

  However, when the number of pins is increased or a plurality of connectors are provided, there is a problem that the control circuit board and the IC card reader are increased in size.

  At present, at least three types of communication methods, that is, antennas for IC cards, that are asynchronous type A, type B, and synchronous type, have been proposed. Although the communication circuit with these antenna modules is shown in FIG. 6, if the above concept is followed, the three types of connection circuits shown in the figure must be incorporated in the circuit board. The asynchronous A type and B type differ in the voltage value of the power supply and the card reading sensitivity.

  The present invention has been proposed to solve such a problem, and an object of the present invention is to provide a miniaturized non-contact type IC card reader that can be used for a plurality of communication-type antenna modules without reworking. It is to provide.

In order to achieve the above object, a non-contact type IC card reader of the present invention includes an antenna module that performs non-contact communication by transmitting and receiving radio waves by electromagnetic induction to and from an IC card via an antenna, and the antenna module. A non-contact type IC card reader comprising: a control unit that connects and communicates with the IC card via the antenna module to read information stored in the IC card, wherein the antenna module The signal received by the contactless communication with the IC card is converted into data and sent to the control unit, while the signal based on the data received from the control unit is transmitted to the IC card by contactless communication. Data in a format corresponding to the type of non-contact communication method with the IC card is transmitted to and received from the control unit, and the control unit transmits the non-contact communication method. Signal processing that performs processing corresponding to all of the above-mentioned data formats to be transmitted / received to / from a plurality of different types of antenna modules corresponding to the type of data, and also transmits / receives data necessary for reading the IC card at a signal terminal And a common connector for connecting to one antenna module corresponding to the type of the selected non-contact communication method, and the signal The connection between the signal terminal of the processing unit and the signal terminal of the common connector is selectively selected as a connection corresponding to the format of the data transmitted and received between the antenna module connected to the common connector and the signal processing unit. and a communication system selection setting means for switching, the signal processing unit, as the signal terminals, corresponding to the non-contact communication method asynchronous A first terminal for transmitting a data signal or a card running signal corresponding to a synchronous non-contact communication method, a second terminal for receiving received data corresponding to an asynchronous non-contact communication method, and synchronous non-contact communication A third terminal for receiving data corresponding to the system, and a fourth terminal for transmitting clock pulses corresponding to the synchronous non-contact communication system,
The common connector includes, as signal terminals, a fifth terminal for transmitting transmission data corresponding to an asynchronous non-contact communication method or a card running signal corresponding to a synchronous non-contact communication method to the analog module, and an asynchronous type A reception type data corresponding to a non-contact communication method or a data type corresponding to a synchronous non-contact communication method is connected to the sixth terminal for receiving from the analog module and the fourth terminal of the signal processing unit, A seventh terminal for transmitting a clock pulse corresponding to a non-contact communication method to the analog module, and the communication method setting means is connected to the common connector among the signal terminals of the signal processing unit. A jumper for connecting only the signal terminal corresponding to the antenna module to the common connector as an effective signal terminal, and the first of the signal processing unit Data conversion between data processed by the analog module of the asynchronous non-contact communication method and data processed by the signal processing unit while connecting to the jumper and the second terminal And when the analog module of the asynchronous non-contact communication system is connected to the common connector, the jumper causes the communication interface and the fifth and sixth terminals of the common connector to be connected to the common connector. And the first terminal of the signal processing unit is connected to the fifth terminal of the common connector via the communication interface, and the second terminal of the signal processing unit is connected to the fifth terminal of the common connector via the communication interface. The analog module connected to the sixth terminal of the common connector and using the synchronous non-contact communication method is connected to the common connector. And the jumper directly connects the first terminal of the signal processing unit to the fifth terminal of the common connector, and the third terminal of the signal processing unit directly connects to the common connector. Connected to the sixth terminal.

In such a non-contact type IC card reader , the communication method selection setting means connects only the signal terminal corresponding to the selected antenna module among the signal terminals of the signal processing unit to the common connector as an effective signal terminal. Has a jumper.

Further, the control unit further includes a plurality of power supply circuit units corresponding to a plurality of antenna modules having different communication types.

The common connector further includes power supply terminals corresponding to a plurality of power supply circuit units corresponding to a plurality of antenna modules having different communication types.

The plurality of communication methods are two types of asynchronous and synchronous types.

The non-contact type IC card reader according to the present invention includes a communication system selection setting means for selectively connecting to one of a plurality of antenna modules having different communication systems, and a common connector. A card reader of a different communication system can be realized on the same substrate. As a result, it is possible to construct an IC card system according to the application using the same circuit board.

  Further, since it is not necessary to provide a separate connector for connecting to the antenna module, the control circuit board constituting the control unit can be saved in space, and the entire card reader need not be enlarged.

In addition, by making it possible to set the selected connection with a jumper, it is possible to further reduce the space of the circuit board and thus reduce the size of the card reader.

Further, in Rukoto comprises a plurality of power supply circuit separate antenna modules, it can also easily accommodate to any of the antenna module.

Furthermore, can be carried out in Rukoto moistened with power supply terminals corresponding to the plurality of power supply circuit corresponding to different antenna module of the plurality of communication type in common connector, the connection to the antenna module in a single connector.

Further, it is possible in Rukoto to correspond to asynchronous two and synchronous total 3 kinds of communication methods, thereby also corresponds to an existing IC card communication technologies.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing a configuration of a non-contact type IC card reader of the present invention.

  The non-contact type IC card reader 10 includes a control unit B formed of a control circuit board and the like, and any one of the antenna modules A1, A2, and A3 individually corresponding to the three communication methods integrated by a casing. In the state, it is arranged in a form incorporated in a box located behind the wall. In the present invention, since the miniaturization can be realized, the box does not need a dedicated box, and an existing switch box having a suitable size can be used.

  Here, the three types of antenna modules correspond to a total of three types of communication systems: asynchronous type A (supply power 12 V), type B (supply power 5 V), and synchronous. Each method has a difference in reading distance, and can be used according to the application.

  The control circuit board B includes a signal processing unit 1 configured by a CPU and the like for performing various signal processing, a common connector 3 for connecting the antenna module A to the control circuit board B, and an antenna module A used. Communication method selection setting means (antenna communication circuit) 2 for selectively switching connection, a plurality of power supply circuits 4a and 4b, a voice synthesis circuit 5, an LED control circuit 6, and a host A communication (RS485) driver 7 for communicating with the device is provided.

  As shown in FIG. 1, the signal processing unit 1 reads the IC card in correspondence with all of the plurality of antenna modules A1, A2, and A3 corresponding to the type of communication method for the IC card reading process. Therefore, it has a signal terminal 1a (Rx, Tx / CLS, RDP, RCP) adapted to send and receive data necessary for this purpose.

  Further, the common connector 3 has signal terminals (Tx / CLS, Rx / RDP, RCP) for connecting to each antenna module A and power supply terminals (DC12V, DC5V, DC24V) corresponding to each antenna module A. I have.

  That is, the control circuit board B of the present invention can connect the selected one of the three types of antenna modules A1, A2, and A3 as shown in the present embodiment, but it can handle three types of signals. Thus, it is possible to connect with one common connector 3 without requiring individual terminals or connectors.

  Next, non-contact IC card communication technology will be described.

  The IC card does not include a power source for operating the IC. When the IC card is held over the IC card reader 10, a weak radio wave is received from the antenna A of the card reader 10 and power is generated in the IC card. The IC card activated by this power and the card reader 10 communicate with each other, and data in the IC card can be read and written.

  FIG. 2 shows the principle of power transmission between the contactless IC card and the card reader.

  As shown in FIG. 2, when an alternating current is passed through a coil-type antenna A provided in the card reader 10, an alternating magnetic field is generated in the air by electromagnetic induction. When the IC card C is opposed to the card reader 10, the loop antenna in the card receives an alternating magnetic field from the antenna A of the card reader 10. The IC card C that has received an AC magnetic field generates an AC voltage, rectifies it into a DC voltage, and serves as a power source for operating the IC.

  This principle is the same in any of the above three types of communication systems, but the frequency of the AC magnetic field is different from 13.56 Hz for the asynchronous A type and B type and 540 kHz for the synchronous type.

  FIG. 3 shows a detailed configuration of the communication method selection setting means shown in FIG. The connection setting of the antenna module A will be described using this figure.

  The left signal line in FIG. 3A is connected to the signal terminal 1a of the signal processing unit 1, and the right signal line is connected to the signal terminal of the common connector. Reference numeral 2a denotes a 3-pin jumper for switching the communication system, and 2b denotes a communication interface (232C driver) provided for asynchronous communication.

  Symbols such as Tx and Rx attached to each signal line indicate the data type as shown in FIG. That is, Tx and Rx indicate transmission data and reception data in asynchronous A or B type communication, and CLS, RCP, and RDP indicate card running signals, clock pulses, and data in synchronous communication.

  As shown in the table of (b), the asynchronous type A requires 12V, the type B requires 5V, and the synchronous type requires 24V. By connecting to the corresponding power supply terminal (see FIG. 1) of the common connector 3, a necessary power supply voltage is selected.

  Tx / CLS shown in (a) indicates that the transmission data is transmitted in the asynchronous communication system and the card running signal is transmitted in the synchronous communication, according to the settings of the jumpers J1 and J2. Similarly, Rx / RDP indicates that received data is transmitted in the asynchronous communication system and data is transmitted in the synchronous communication.

  More specifically, when the asynchronous (A or B type) antenna module A1 or A2 is built in, the setting of the jumpers J1 and J2 is set to connect 1-2 as shown in FIG. When the synchronous antenna module A3 is incorporated, the jumpers J1 and J2 2-3 are set for connection.

  As described above, since the communication system selection setting means 2 having a jumper or the like to selectively connect with one of the plurality of antenna modules A1, A2, and A3 having different communication systems, and the common connector 3, Any type of antenna can be used, and a card reader of a heterogeneous communication system can be realized on the same circuit board. As a result, it is possible to construct various IC card systems according to applications on the same circuit board.

  That is, according to the IC card reader shown in this embodiment, when the communication method is changed after construction, it is not necessary to replace the card reader itself, and only the antenna module needs to be replaced.

  Further, since the common connector 3 uses signal terminals in common, there is no need to increase the number of terminals, and one signal terminal includes three terminals for signals and three terminals for power supply (FIG. 1). It is only necessary to provide the common connector 3. As a result, the card reader can be kept downsized and can be incorporated in a standard switch box or a dedicated box used conventionally.

  Here, the signal is selected by inserting a jumper plug, but it may be selected by a changeover selection switch such as a DIP switch.

  FIGS. 5A and 5B show the asynchronous and synchronous communication waveforms described above.

  In the present embodiment described above, the IC card reader 10 is configured to include only one selected antenna module A, but may be configured to include all three types of antenna modules.

  Moreover, although the thing corresponding to said 3 types was demonstrated, the thing corresponding to 2 types or 4 types or more may be sufficient. That is, any configuration may be used as long as it includes a communication method selection setting unit that selectively switches signals and a common connector corresponding to a plurality of antennas.

It is the block diagram which showed the structure of the non-contact-type IC card reader of this invention. It is a figure which shows the principle of operation of a non-contact-type IC card reader. (A) is a figure which shows the detailed structure of a communication system selection setting means, (b) is a table | surface which showed the data classification, the power supply voltage value, etc. for every communication system. It is the figure which showed the connection aspect of the jumper setting. (A) is an asynchronous type, (b) is a diagram showing a synchronous communication waveform. It is the figure which showed 3 aspects of the conventional IC card communication technique.

Explanation of symbols

10 ... Non-contact IC card reader A ... Antenna module A1: Asynchronous A type A2: Asynchronous B type A2: Synchronous B ... Control unit (control circuit board)
1 ... Signal processor (CPU)
1a: Signal terminal 2 ... Communication system selection setting means (antenna communication circuit)
2a, J1, J2 ... jumper 2b ... communication interface 3 ... common connector 4a, 4b ... power supply circuit C ... IC card

Claims (4)

An antenna module that performs non-contact communication by transmitting and receiving electromagnetic induction radio waves to and from an IC card via an antenna, and communication with the IC card via the antenna module by connecting to the antenna module A non-contact type IC card reader comprising a control unit for reading information stored in the IC card,
The antenna module is
While the signal received by the non-contact communication with the IC card is converted into data and sent to the control unit, the signal based on the data received from the control unit is transmitted to the IC card by non-contact communication,
Send and receive data in a format corresponding to the type of non-contact communication method with the IC card to and from the control unit,
The control unit
Performs processing corresponding to all of the data formats to be transmitted to and received from a plurality of different types of antenna modules corresponding to the type of the non-contact communication method, and transmits data necessary for reading the IC card to a signal terminal A signal processor to send and receive in
A common connector for connecting to one of the antenna modules according to the type of the selected non-contact communication method, including a signal terminal that can be connected to all different types of antenna modules.
The connection between the signal terminal of the signal processing unit and the signal terminal of the common connector is selected as a connection corresponding to the format of the data transmitted and received between the antenna module connected to the common connector and the signal processing unit. Communication method selection setting means for switching automatically ,
The signal processing unit as a signal terminal,
A first terminal for transmitting transmission data corresponding to an asynchronous non-contact communication method or a card running signal corresponding to a synchronous non-contact communication method;
A second terminal for receiving received data corresponding to an asynchronous contactless communication method;
A third terminal for receiving data corresponding to a synchronous non-contact communication method;
A fourth terminal for transmitting a clock pulse corresponding to a synchronous non-contact communication method;
Have
The common connector is used as a signal terminal.
A fifth terminal for transmitting to the analog module a transmission data corresponding to an asynchronous non-contact communication method or a card running signal corresponding to a synchronous non-contact communication method;
A sixth terminal for receiving, from the analog module, received data corresponding to an asynchronous non-contact communication method or data corresponding to a synchronous non-contact communication method;
A seventh terminal connected to the fourth terminal of the signal processing unit and transmitting a clock pulse corresponding to a synchronous non-contact communication method to the analog module;
Have
The communication method setting means is
Among the signal terminals of the signal processing unit, only a signal terminal corresponding to the antenna module connected to the common connector, a jumper for connecting to the common connector as an effective signal terminal,
The data processed by the analog module of the asynchronous non-contact communication method and the data processed by the signal processing unit while being connected to the first and second terminals of the signal processing unit and connected to the jumper A communication interface for performing data conversion with
When the analog module of the asynchronous contactless communication method is connected to the common connector, the communication interface and the fifth and sixth terminals of the common connector are connected by the jumper, and the signal processing unit A first terminal is connected to the fifth terminal of the common connector via the communication interface, and a second terminal of the signal processing unit is connected to the sixth terminal of the common connector via the communication interface. ,
When the analog module of the synchronous contactless communication method is connected to the common connector, the jumper connects the first terminal of the signal processing unit directly to the fifth terminal of the common connector, and A non-contact type IC card reader in which a third terminal of a signal processing unit is directly connected to the sixth terminal of the common connector . In claim 1,
The non-contact type IC card reader, wherein the control unit further includes a plurality of power supply circuit units corresponding to the plurality of types of antenna modules. In claim 2,
The non-contact type IC card reader, wherein the common connector further includes a plurality of power supply terminals corresponding to a plurality of power supply circuit units corresponding to the plurality of types of antenna modules. In any one of Claims 1-3,
The non-contact type IC card reader is characterized in that the plurality of non-contact communication methods include two types of asynchronous type and three types of synchronous type.

Images